[3][4] In January 2003, Mamun and Justice Mohammad Joynul Abedin issued a stay order on elections in Sandwip Municipality.
[5] In April 2004, Mamun and Justice Shah Abu Naim Mominur Rahman declared crown and hunter drinks illegal.
[6] Mamun served for two years on the High Court Division and received a six-month extension on 29 July 2004[7] and was assured by the minister of law Barrister Moudud Ahmed that his appointment would be confirmed.
[3] Mamun filed a writ petition and on 23 July 2008 Justice Khademul Islam Chowdhury and Justice Mashuque Hosain Ahmed of the High Court Division asked the government why it should not be ordered to make Mamun a permanent judge of the High Court Division.
[10] The Chief Justice Md Muzammel Hossain of the Appellate Division of the Bangladesh Supreme Court canceled the bail order of his son, Asif Adnan Shuvo, and Fazle Elahi Tanzil, another recruit and son of a bureaucrat.